Dumping vehicle hoist



May 6, 1930. c. F. HIGGINS DUMPING VEHICLE HOIST Filed April 5, 1925 3 Sheets$heet l May 6, 1930.

C. F. HIGGINS DUMPING VEHICLE HOIST Filed April 3, .1925

3 Sheets-Sheet 2 y 1930- c. F. HIGGINS 1,757,191

DUMPING VEHICLE HOIST Filed April 3, 1925' 3 heets-Sheet 3 \i '7 k- F m II/ 1 '///////////////.\\\\\\\\\\\\\v are rotated in reverse directions. --;Tlie gears are loosely mounted on a shaft 54 to whlch either the gear orthe gear 52 may be clutched by means of a clutch splined on the shaft 54: and engaged by a yoke 56 connected through a rod 58 with a hand lever 60 at the operators seat in any suitable manner, as will be obvious to those skilled in the art. It will be seen that upon proper manipulation of the handlever 60, the shaft 5eand consequently the shaft 24 may be caused to rotate in either direction. The shaft 24 connects through the universal joint'28with a shaft G2 in'the gearing casing, which shaft carrie's 'aworm-G meshing with a worm gear 66 on a shaft-68' journaled in the'casing.

The shaft 68 is formed witha pinion gear 70 which meshes with a chain shaft driving gear72'secured to the chain shaft 32. Upon rotation of the shaft 24 in one direction due to the connection of one of the gears ofthe power take-off therewith the chain shaft-32 is rotated to elevate the'body, and upon rotation of the shaft in the opposite direction the body is connected with the hoisting mechanism to be returned to its original position.

Provision is made for manually controlling the direction of operation of the above described parts and for automaticallyshipping the clutch as the body approaches the limit of'its movement in either direction For this latter purpose a timinggear train indicated generally at 7 4 1n Fig. 2 is, operated upon r0- tation of the shaft, theinitial gear 76 of the train being mounted on the Worm gear shaft '68 and leading through a series of reducing gears to rotate the timing gear 78. The gear .78 is provided with apin 80' which is in the positionindicated in dot-and-dashlines in Fig. 2 when the body is in lowered position,

and which moves in a counter-clockwise direction with the gear 7 8 asthe body is elepivoted at one. end to an arm 84 which is connected through a rock shaft86 with an arm externally of the casing, this latter arm con- .necting through. a rod with a hand lever 92 placed near the seat of the operator. The link 82 has a projection 85 provided with "oppositely inclined surfaces 87 and 88 which areadapt'ed tobe selectively placed in the I path of movement of the pin by operation of the lever 92 for determining the operation of the timing mechanism. The degree of movement imparted to thelink by operation of the lever 92 is such that at one limit of movement the surface 87 is brought into the path of the pin 80 to control the operation of the hoisting mechanism as the gear turns in a counter-clockwise directioncorrespondingto an'elevation of the body, and the surfac'e88 brought into the path of the pin 80 as the gear rotates in'the reverse direction, corresponding to a movement of the body to its original position. The link is provided at its rear end with a slot 94 within which is received a pin 96 on a clutch shipper arm 98 connected through a rockshaft 100'with an exterior arm-102 which 'in turn is connected by a rod 104 with the clutch'pedal link 16 in such a manner that upon rotation'of the 'to separate the elements of the clutch.

' The operation of the above mentioned parts is described as follows: While the body inhorizontal or carrying position, the

parts are in the position shown ingFig. 2* with'the pin'80 in the position indicated in dot-and-dash lines. Duringthe hoistingoperation the chain shaft 32 rotates in a ,counter-clockwise direction, as viewed in Fig. 2,

thus mov ng the tim ng gear 78 also ma counter-clockwise direction. As the body approaches th'e'limit of its hoisting move- 'ment, the pin 80 comes into contactwith the surface 87 or the link :84 as shown in Fig. 2,

, and :upon further movement it depresses the link into the position shown in Fig. 3, thus rotating the shipper arm 98 and drawing upon the ,shipper rod 104: to separate the clutch elements. The body is thus retained in dupingposition, being prevented from'returnmgunderits own-welght by vlrtue .ot

the'engagement of the worm gear 66 with the worm 64;.' .After the dumping operation has .been completed thehand lever 60 is actuated to connect the poi'ver'take off with its shaft" "54 in such away that the shaft24e andthe gear shaft 62 will be rotated in the opposite operation of the lever 60, the lever 92 is moved to carry the link 82;into the position shown in Fig. 4',"'so that its surface 88 will lie in the path of the'pin 80 upon the return of the I H j timing gear 78 to its initial position. This vated. The 'pin cooperates with alink 82 movement of the link 82 from under the pin 80 frees the clutch shipper arm 98 and permits it to rise so that the clutch elements are engaged by the action ofthe clutch spring 18. The body then returns to its horizontal position, the.pin.80 finally arrivinglinto engagement withthe surface 88 of the link 82, 'thusdepressing it and at the same timeturning the clutch shipper arm 98'about the rock I shaft" 100 to separate the clutch'elements as .ama'ms before. The arm is then moved. so that the power take-off IS in neutral, in order that rotation of the transmission gears in driving anism. The lever 92 may then be moved so that the surface 88 of the link 84 is removed from under the pin 80, thus permitting the clutch shipper arm '98 to rise andallow the.

clutch elements to engage with each other. The vehicle is now ready to be driven in the usual way by the driving connection from the engine through the clutch and transmission to the rear wheels.

' sion by means of an operating lever 130. r The A modified and, in some respects, preferable form of the invention is shown in Figs,

6 to 9. In this form the clutch and reversing drive are contained within the hoist gearing casing, and provision is made for a one-direction take-0E from the transmission to-the hoist earing. As shown in Fig. 6, the gear casing 120, within which is journaled the chain shaft 122 similar to the shaft 32, is mounted at one side of the vehicle rather than at the center, as in the first described form, the hoisting chains, however, being adapted for connection tothe shaft in an A shaft 124 carexactly similar manner. rying a sliding gear 126 constitutes thepower take-off, the gear at 126being adapted for engagement with a gear128 of-the'transmisshaft 124 connects through a sprocket chain 132 and suitable gears with a shaft 134 entering the gear casing'120. Theshaft 134 has splined thereon forlongitudinal movement a clutch member 136 adapted to transmit the movement of the shaft 134 to operate a worm shaft 138 in either direction. For this purpose the clutch member 136 is provided with a series of'end face teeth 140 adapted to cooperate with similarly formed teeth 142 on a gear 14.4 which is rotatable on the shaft 134 and is permanently in mesh with a gear 146 keyed to the worm shaft 138.

The clutch member at the limitof its righthand movement, as viewed in Fig. 9, is adapted to engage with the gear 144 through the teeth 140 and 142, and it is provided with a gear 148, which at the limit of its left-hand movement engages with an idler 150 journaled in the casing and engaging in turn with a gear152 keyed to the worm shaft 138. A shifter yoke 154 received in a groove 1 56 in the clutch member and having a hub 158 secured to a shifterrod 160 provides for moving the clutch member to engage with either the. gear 144 or the idler 150, or to be placed in a neutral position between them. Theactuating rod 160 con nects through a pivoted arm 162 with a link 164 adapted to be actuated by a handlever 166 to move the clutch member to any desired position on the shaft 134. On the worm 1:22; the side the casingand-- a. bear ng; 114; pmjecti-ng frm the vehicle will not operate the hoisting mech- ;;The' timing imechanisn i lows {Formed integlal"with the chain shaft .122iis aish-aftllfi journaledin-the side of'the' gean casing and provided with a gear 178 which; drives aitiming gear 18Qthrough-inichis jeurnaled in I hearing. 172, in

he; icentral p rt-ion of the a ing; It-Will be seenthat upon actuation of the 'le'veri 16.6 to engage-the-clutch member so that the body mx hybel iS d.onloweredas desired. 4 Y a. 1

described asafoh termediatejgears 1 82 and 184. ,Tlae;}tiini-nig gear1'80hasla huh-186 upon which is formed ilng; .1 88 adaptedto'engage a projection 190' V 011'} the; clutchshiftjerhub- 158-asjjthe, gear rotated; Ad-jzustablw secured tothe hub 186 is collar :187 which has-j a projection '.1.92"adapted'to engage witha projection 1'94 on the clutch 3 shifter 'h uh-when the timing gear is rotated initihe opposite-direction.- The.- -provision forgrelative movement between the"hub;186,--and-the collar 187permits adajustm-ent between the projections 188 and 192. Assumingthat lthe parts are thelposi'tion indicated Figa7rwiththe gear148 in engagement. with the idler. 1 504130 rotate. the

chain shaft 122 to'give ahoistingmovement i to the hotly, as the body appreaches the-alimit of its elevation:thehlng 188 engages-with the 3 projection 319l0gand moves the yoke to: neutral position, thus disconnecting the shaft 134 from the worm shaft and prevent further lifting stress from being applied to the body. The bodyeis maintained in elevated position against the action of gravity by the engagement of'the worm gear 17 0 with its worm 168. To return the body to .initial'position it is necessary to engage the clutch member 136 with the gear 144 through their end face teeth,"thus rotating the chain shaft in the opposite direction. As the body arrives at its horizontal position, the clutch is thrown to neutral position by the movement of the shifter yoke through engagement of the projections 192 and 194. 'The hoist gearing may. then be entirely disconnected from its operating source by disengaging the gears. 126 and128, thus permitting the vehicle to be driven in the usual manner. v

Having thus described the invention, what is claimed is:

1. A dumping vehicle hoist having, in combination, a body, a powenoperated shaft, a winding shaft, a clutch member on the poweroperated' shaft, gearing adapted to engage with the clutch member to drive the winding shaft in eitherdirection, a clutch shifter for causing engagement of the clutch mem-. her with the gearing to drive the winding shaft,-the clutch shifter having offset projeetions, a manual control for the clutch shift- 'er,timinggearing operated by the Winding shaft, and a pair of offset lugs carried by the timing gearing to engage with the projec tions of 'tlie"shifter,"0ne of which "lugs is adapted to throw the clutch into neutral'position as the body approaches the limit of its movement in one direction, and the'other of I. which is adapted to'throw the 'clutch'into neutral as the body approaches the 'limitbf its movement in the other direction. 7

2. Adumping vehicle'hoist having, in combination, adrivenishaft, a hoisting shaft, aclutch member splined on-the driven shaft,

a clutch shifter for moving the clutch mem-- her longitudinally of the I driven shaft" and having a pair of projections; gearing adapted to engage with theclutch member atithe v t limits of its longitudinal movement to drive 0 the winding shaftin either direction, a tim- -ing gear driven by the winding shaft, a lug carried by the timing gear adapted to engage one of the'projections'of the clutch shifter, a second lug operated by the timing gear and adapted to engage with the other projection of theclu'tch' shifter ubon'movement of the winding shaft in the reverse direction, where by the clutch is moved to neutral position as the body approaches the'limit of its movement in either direction, and means permitting a'djustmentof the tiniing gear lugs relatively to eachother; -f T 'ln'testimony'whereof "I have signed my name to this specification K cnanKr r. HIGGINS. 

